The user of Host1 wants to ping the DSL modem/router at 192．168．1．254． Based on the Host1 ARP table that is shown in the exhibit, what will Host1 do?

A、 send a unicast ARP packet to the DSL modem/router
B、 send unicast ICMP packets to the DSL modem/router
C、 send Layer 3 broadcast packets to which the DSL modem/router responds
D、 send a Layer 2 broadcast that is received by Host2, the switch, and the DSL modem/router

【正确答案】 B

【答案解析】在下面的表中我们可以看到ARP表中有关于192．168．1．254的ARP条目，所以在这主机都只需要发送单播的ICMP包到DSL modem/router即可。